body {
    background-color: #f5f7fa;
}

.screen {
    width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.navHeader {
    height: 70px;
    background: #4b7bdb;
    line-height: 70px;
    width: 100%;
    position: relative;
}

.logo {
    width: 160px;
    float: left;
}

.logo a {
    float: left;
    background-repeat: no-repeat;
    width: 160px;
    height: 42px;
    display: inline-block;
    margin-right: 10px;
    margin-top: 15px;
    background-position: center center;
}

.nav_header {
    float: left;
    margin-left: 32px;
}

.nav_header a {
    display: inline-block;
    float: left;
    height: 70px;
    line-height: 70px;
    font-size: 14px;
    color: #fff;
    font-weight: bold;
    padding-left: 40px;
    padding-right: 10px;
}

.nav_header a.activeHeader {
    background-color: #2f62cb;
}
